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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Battery Operated Sensing Device Requirements for 802.15.4g] Date Submitted: [12 May 2009] Source: [Mark Thompson, Kendall Smith] Company [Aclara RF]

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slide1

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [Battery Operated Sensing Device Requirements for 802.15.4g]

Date Submitted: [12 May 2009]

Source:

[Mark Thompson, Kendall Smith] Company [Aclara RF]

Address [23905 Mercantile Rd., Beachwood, OH 44122] Voice:[+1.216.896.8552]

E-Mail:[mthompson@aclara.com, ksmith@aclara.com]

Re: [IEEE 802.15.4g Working Group]

Abstract: Discussion of a proposal to add provisions for Battery Operated Sensing Devices.

Purpose: To allow for battery operation in 802.15.4g network

Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Kendall Smith, Mark Thompson, Aclara RF

aclara rf phy
Aclara RF PHY
  • Our PHY is completely different
  • Not here to propose our PHY

Kendall Smith, Mark Thompson, Aclara RF

what has worked
What has worked?
  • Low background noise
  • High power signals
  • Slow data rates
  • Redundancy
  • Protection of radio channel(s)
  • Battery and powered endpoints
  • “Unlimited” scalability

Kendall Smith, Mark Thompson, Aclara RF

link budget
Link Budget
  • +154 dBm

Kendall Smith, Mark Thompson, Aclara RF

battery life
Battery Life
  • What do utilities want:
    • 20 year battery life
    • 10 years is too small
  • Service calls to replace batteries are unacceptable, endpoint should last as long as the equipment it is attached to
  • Millions of deployed devices in service

Kendall Smith, Mark Thompson, Aclara RF

battery life1
Battery Life
  • What techniques can be used in a MAC/PHY design to allow for long battery life
  • Fast network acquisition and association
  • lower freq = lower power = better propagation
  • Rx sense lower, overcome with tx power
  • short messages ~8 octets
  • allow one way operation

Kendall Smith, Mark Thompson, Aclara RF

to achieve low power
To Achieve Low Power
  • MAC changes that support the low energy devices must supported and pushed by the 4g group
  • TG4e

Kendall Smith, Mark Thompson, Aclara RF

tg4e par
TG4e PAR
  • 5.2 Scope of Proposed Standard: The intent of this amendment is to enhance and add functionality to the 802.15.4-2006 MAC to a) better support the industrial markets and b) permit compatibility with modifications being proposed within the Chinese WPAN.Specifically, the MAC enhancements are limited to:• TDMA: to provide a) determinism, b) enhanced utilization of bandwidth• Channel Hopping: to provide additional robustness in high interfering environments and enhance coexistence with other wireless networks• GTS: to increase its flexibility such as a) supporting peer to peer, b) the length of the slot, and c) number of slots• CSMA: to improve throughput and reduce energy consumption• Security: to add support for additional options such as asymmetrical keys• Low latency: to reduce end to end delivery time

Kendall Smith, Mark Thompson, Aclara RF

slide9
TG4e
  • 4e Low Energy Study Group
    • Thursday PM Session

Kendall Smith, Mark Thompson, Aclara RF

presentations supporting battery ops
Presentations Supporting Battery Ops
  • Aclara
  • NICT
  • Fuji
  • Mistubishi
  • TI
  • Sensus
  • Elster
  • Itron

Kendall Smith, Mark Thompson, Aclara RF

tg4g tg4e
TG4g – TG4e
  • Assuming Battery Operated Devices in initial SUN standard - then, MAC changes to TG4e relating to Low Energy operations must be completed in parallel
  • This is a critical and urgent component of 802.15.4g

Kendall Smith, Mark Thompson, Aclara RF

spectrum
Spectrum
  • PAR calls for license exempt spectrum frequency bands
  • Countries like Canada, Japan, and the UK are allocating dedicated use spectrum for utilities
  • Fits within the spirit of the PAR
  • The PHY should be able to use that flexible spectrum as it becomes available

Kendall Smith, Mark Thompson, Aclara RF

what has worked how to achieve in sun
What has worked? How to achieve in SUN?
  • Low background noise
  • High power signals
  • Slow data rates
  • Redundancy
  • Protection of radio channel(s)
  • Battery and powered endpoints
  • “Unlimited” scalability

Kendall Smith, Mark Thompson, Aclara RF

suggestions
Suggestions
  • Low background noise
    • Allow operation on “dedicated” or licensed bands
  • High power signals
    • Allow operation on “dedicated” or licensed bands
  • Slow data rates
    • Allow flexibility in speed / range tradeoffs

Kendall Smith, Mark Thompson, Aclara RF

suggestions1
Suggestions
  • Redundancy
    • Allow increased range to permit economical redundancy
  • Protection of radio channel(s)
    • Allow operation on “dedicated” or licensed bands

Kendall Smith, Mark Thompson, Aclara RF

suggestions2
Suggestions
  • Battery and powered endpoints
    • Insure that appropriate MAC changes are enacted with SUN release
    • Insure that power consuming behaviors are not mandated
  • “Unlimited” scalability

Kendall Smith, Mark Thompson, Aclara RF

thank you
Thank you

Kendall Smith, Mark Thompson, Aclara RF